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Greetings Again 7RMBoy,
Yes seating the projectile closer to the rifling does increase pressures and velocity slightly. The greatest effect is with cartridges like the Weatherby magnums that usually...

Greetings 7RMBoy,
Congratulations, you have asked one of those questions to which there are many answers. In short there are ways to estimate pressures but not to calculate them. Most manuals these...